Sr Citizen under IT Act

At present any person who attends 60 years on any day during a financial year is considered a sr citizen for assessment of his tax for the following assessment year.
What was the provision of law in this regard for AY 2010-11?

At present any person who attends 60 years on any day during a financial year is considered a sr citizen for assessment of his tax for the following assessment year.
What was the provision of law in this regard for AY 2010-11?

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What about Sr. citizens having income fro business? Main problem is how to estimate income from business where the sales are totally dependent on export orders and are not spread over the years equally. how to pay advance tax on due dates and avoid panel interest?